2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

how do i go about getting my FC to be a twin turbo?

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Old Oct 24, 2010 | 10:57 AM
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how do i go about getting my FC to be a twin turbo?

i blew up my s4 engine and i just ordered my s5 from japan2la and i was wondering if i can take my s4 and s5 turbo and make a twin setup from that?

If i can twin my FC where can i buy the twin manifold, if i can get a link that would be cool.

thanks for helping
Old Oct 24, 2010 | 11:07 AM
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Everything is possible, but i think you need to make your own manifold.
Old Oct 24, 2010 | 11:08 AM
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hmmm how in the world would i do that lol?
Old Oct 24, 2010 | 11:09 AM
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Oh boy...things like this make the natives restless

No is the answer
Old Oct 24, 2010 | 11:11 AM
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Originally Posted by JustJeff
Oh boy...things like this make the natives restless

No is the answer
but why is it not possible?
Old Oct 24, 2010 | 11:13 AM
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Short answer: No. If the mere thought of any modding - reflected by the response - is 'how,' than no.

Long answer: Isn't the FD TT manifold the same bolt-pattern? You could try using that, but potentially having to run the NS mod, since you wouldn't be running six-kaBILLION solenoids, like on the FD.

If you're bolting it to a new engine, I'd say just get an aftermarket manifold, that way you can relocate the turbos... I think that may be your biggest problem: capacity.

I know how much of a PITA stuffing one turbo in, between the manifold and the frame, much less TWO.

Otherwise: see above.
Old Oct 24, 2010 | 11:14 AM
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I gues it would be possible, but it would be alot of work, and it will cost mony, i mean.

You need to change everything. But i wonder if you get enough exhaust fumes to keep them going.
Old Oct 24, 2010 | 11:15 AM
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Originally Posted by TrboSpdAnt
Isn't the FD TT manifold the same bolt-pattern? You could try using that, but potentially having to run the NS mod, since you wouldn't be running six-kaBILLION solenoids, like on the FD.

If you're bolting it to a new engine, I'd say just get an aftermarket manifold, that way you can relocate the turbos... I think that may be your biggest problem: capacity.

I know how much of a PITA stuffing one turbo in, between the manifold and the frame, much less TWO.

Short answer: No. If the mere thought of any modding - reflected by the response - is 'how,' than no.

Long answer.... See above.
ill look into that. ty
Old Oct 24, 2010 | 11:17 AM
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ill just drop this idea then and ill get one huge turbo
Old Oct 24, 2010 | 11:18 AM
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When a common mod to FD's is to swap to a single turbo, why are you thinking backwards? Save your money and keep upgrading the S4/5.
Old Oct 24, 2010 | 11:22 AM
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I wasn't going to suggest that, since I was trying to answer the question, but I do agree.

You can go to Rotary-works and pick up a ST manifold > Here... I think xBoxThug13B has one, FS, as well.. Hit him up.

Either way, you're also going to have to source an external WG. but the ST manifold will relocate the turbo, nicely.
Old Oct 24, 2010 | 11:24 AM
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ITs been done before. I made a thread about this a while ago but decided it would be to much work for the gains.
Old Oct 24, 2010 | 11:27 AM
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Awesome!

Post the link so that he can read it. Maybe it'll either seal the deal to continue or make him have a change of heart.
Old Oct 24, 2010 | 11:28 AM
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ty everyone for your reply's
Old Oct 24, 2010 | 11:31 AM
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Originally Posted by JC6711
ITs been done before. I made a thread about this a while ago but decided it would be to much work for the gains.
plz do post it
Old Oct 24, 2010 | 11:32 AM
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Originally Posted by tuscanidream
When a common mod to FD's is to swap to a single turbo, why are you thinking backwards? Save your money and keep upgrading the S4/5.
FD is sequential, his plan is parallel if i understand correctly.
Old Oct 24, 2010 | 11:42 AM
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Originally Posted by GeenIdee
FD is sequential, his plan is parallel if i understand correctly.
i dont know enough to even know what you just said. allive ever seen for twin turbos is just straight in line with the exhaust.

if parallel means they are straight with the exhaust then yes i want to do that.

Last edited by redonwhite; Oct 24, 2010 at 12:04 PM.
Old Oct 24, 2010 | 12:07 PM
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won't two turbos that size give you a crap load of lag? your high end would be good.... i think. but the lag would kill you
Old Oct 24, 2010 | 12:19 PM
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Originally Posted by raksj04
won't two turbos that size give you a crap load of lag? your high end would be good.... i think. but the lag would kill you
as i stated im not to smart on this stuff yet. i just enjoy the idea of twin turbos but as im seeing people are saying a single may be better. thats what i have been gathering.
Old Oct 24, 2010 | 12:22 PM
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Be cool and sell the S5 engine and by a 13b-REW and swap that in.
Old Oct 24, 2010 | 12:36 PM
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the FD has a smal and a big turbo if im correct. At lower rpm turbo 1 does his job, above the biger one takes over.

What i meant with parallel is they both work at the same time. But you do need enough kick out of the exhaust to get them both running.

The time at wide open throttle that the turbo is not working is called lag.
Old Oct 24, 2010 | 12:48 PM
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Originally Posted by GeenIdee
the FD has a smal and a big turbo if im correct. At lower rpm turbo 1 does his job, above the biger one takes over.

What i meant with parallel is they both work at the same time. But you do need enough kick out of the exhaust to get them both running.

The time at wide open throttle that the turbo is not working is called lag.
ty for filling me in on the lag. i really didnt have any clue of what that was. why would the 13b have problems pushing the turbos?

but yes i would want my setup to be parallel.
Old Oct 24, 2010 | 12:49 PM
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Originally Posted by jaggermouth
Be cool and sell the S5 engine and by a 13b-REW and swap that in.
my next engine swap will be a 20b after i deploy
Old Oct 24, 2010 | 12:55 PM
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Originally Posted by GeenIdee
the FD has a smal and a big turbo if im correct. At lower rpm turbo 1 does his job, above the biger one takes over.
Thank you Jeremy Clarkson!













Both turbos are the same size.
Old Oct 24, 2010 | 01:02 PM
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Originally Posted by tuscanidream
When a common mod to FD's is to swap to a single turbo, why are you thinking backwards? Save your money and keep upgrading the S4/5.
Granted rotaries can spool giant turbos with minimal lag, if you're shooting for flat out response at any given rpm, twins are rather peachy for that. Their combined cfm makes for big power and running smaller turbos increases spool.

However, you can run a non-divided manifold with a large aftermarket single and have a quick spool valve to block one scroll side off until a desired rpm/boost level.

You CAN run twins, sequential, parallel, compound, single...whatever the hell you want. Just do research. Dont bother asking. Makes you sound like someone who just graduated from swapping bone stock b series motors into a honda civic.



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